Best Sattelsttze 30 9 2026

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Last Updated - 22.07.2026

Best Choice

01

Yinnhom

Bicycle Dropper Seat Post, Hydraulic Adult Telescopic Seat Post, 30.9/31.6 mm, Height-Adjustable Aluminium Alloy for Bicycle, Total Length 400 mm (30.9 mm)

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9.9

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Ultimate riding comfort: Our spring-loaded seat post provides ultimate driving comfort by minimising shocks and shocks to give you a comfortable ride. The bicycle seat post is 380/445 mm long and has a diameter of 30.9/31.6 mm (1.22/1.24 inches), which is suitable for most road bikes. NOTE: Please measure and confirm the outer diameter and length of your bike seat post before purchase to make it fit this item.
Safety in use: On the bottom of the seat post there is a safe line marking, please insert at least above the minimum safety line to avoid hidden dangers. The safety wire has minimal wear and the seatpost axle is ground to ensure smooth ends and prevents scratches. Quick and easy installation, no cutting required, easy setup without installation instructions.
Robust and durable: the seat post is made of aluminium alloy, robust and durable, which is pressure and abrasion resistant. Polished and anodized for good corrosion resistance, light weight and durability. The surface is anodized and will not fade. It also has a rust protection coating that ensures long-lasting performance. Ideal replacement for worn or broken seat post of most mountain bikes.
Easy to adjust: Adjust the height of your bike seat effortlessly with our adjustable bicycle seat post. With a travel range of 100/125 mm and a hydraulic locking system, it is easy to stop at any position and maintain the desired height. This versatile accessory is ideal for all terrain and features a user-friendly handle for manual adjustment.
Bicycle essentials: the use of our bicycle seat post with sealing ring design prevents rain, cement, sand and dust from entering your seat tube and keeps your bike clean. This product is an indispensable accessory for bicycle enthusiasts and DIY bicycle projects, and easily improves the functionality and beauty of your bike.

49,99 €
02

BESNIN

BESNIN Seat Post 30.4 x 350 mm Bicycle Seat Post Bicycle Seat Angle Adjustable Seat Posts for MTB Road Bike BMX

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

This seat post is adjustable in angle. Please see our detail page for specific parameters.
The outer diameter of the seat post is 30.4 mm. Please measure your bike and choose the right model.
Suitable for most road bikes, fixed gear bikes, mountain bikes, downhill bikes, road bikes, MTBs, BMXs, DHs etc.
Size: 30.4 × 350 mm, outer diameter: 30.4 mm, total length: 350 mm, weight: 370 g.
Material: 6061 aluminum alloy (tube part), anti-corrosion, anti-oxidation, suit for long time cycling.

23,99 €
Value for Money

03

WANGSHAOWEI

WANGSHAOWEI Aluminium Seat Post for Mountain Bike and Road Bike, 27.2/31.6/33.9 mm Diameter, Dropper Seat Post, 580 mm, Black 27.2 x 500 mm

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

The robust structure is not only beautiful, but can also compensate for the shortcomings of the smaller frame and increase maneuverability when driving.
Replacement seat post for most bicycle, mountain bike, road bike, universal bicycle.
Please measure and confirm the diameter you actually need before purchasing.
High strength and fatigue resistance. Corrosion resistant, exquisite workmanship, beautiful touch feeling.
Change the pedal posture and driving angle to avoid knee damage. Suitable for descent and off-road.

21,67 €
04

Bynccea

Bynccea Bicycle Seat Post 27.2 mm 30.9 mm 31.6 mm Aluminium Alloy Seat Post 400 mm for Mountain Bikes Road Bike Downhill Bike Track Bicycle Fixed Gear MTB BMX

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Total length: 400 mm
Suitable for road bike fixed gear bike mountain bikes downhill bike track bike BMX MTB
Size: 27.2/30.9/31.6 mm
Made of aluminium alloy 6061 T6, durable and rust protection, convenient to install
Bynccea Seat post with adjustable head so you can have your seat at the angle you like

16,99 €
05

PLATT

PLATT Bicycle Seat Post Shim Aluminium Alloy Tube Adapter, Seat Post Reducer Sleeve Shim Bicycle Adapter for MTB (27.2 to 30.9)

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Tip: Please check or measure the outer diameter of the original seat post OR measure the inner diameter of the bicycle frame seat tube. Then make the right choice.
Size: 27.2 to 30.9, use this bicycle seat post. The 27.2 seat post can be converted into the 30.9 seat post.
Material: This bicycle seat post washer is made of high quality aluminium alloy, lightweight, strong, durable and corrosion resistant.
Length: 100 mm, our washers are made to 100 mm length and are longer than other washers on the market, giving your seat post much better grip in the frame.
APPLICATION: With this seat post shim, the diameter of the bicycle seat post can be easily adjusted to a larger frame, eliminating the need to buy the bike seat post again.

9,99 €
06

HOTMNTY

Bicycle Seat Post Shim, Aluminium Alloy Tube Adapter, Bicycle Seat Post Adapter, Seat Post Reducer Sleeve Shim Bicycle for MTB, Seat Post Adapter Adjustment Disc 27.2 mm - 30.9 mm

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Useful use: easy to install and remove, convenient for you. And you can change the size of the bicycle seat tube as you like.
Suitable for various bicycles: suitable for mountain bike, hybrid bike, old school, cruiser, cyclocross bike, dirt jumper, folding bike, road bike.
Size: 27.2 mm to 30.9 mm, use this bicycle seat post washer. The 27.2 seat post can be converted into the 30.9 seat post.
Material: This bicycle seat post washer is made of high quality aluminium alloy, lightweight, strong, durable and corrosion resistant.
Length: 100 mm, our washers are made to 100 mm length and are longer than other washers on the market, which makes your seat post much better grip in the frame.

7,89 €
07

PLATT

PLATT Bicycle Seat Post Shim Aluminium Alloy Tube Adapter, Seat Post Reducer Sleeve Shim Bicycle Adapter for MTB (31.6 to 33.9)

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Tip: Please check or measure the outer diameter of the original seat post OR measure the inner diameter of the bicycle frame seat tube. Then make the right choice.
Size: 31.6 to 33.9, use this bicycle seat post. The 31.6 seat post can be converted into the 33.9 seat post.
Material: This bicycle seat post washer is made of high quality aluminium alloy, lightweight, strong, durable and corrosion resistant.
Length: 100 mm, our washers are made to 100 mm length and are longer than other washers on the market, giving your seat post much better grip in the frame.
APPLICATION: With this seat post shim, the diameter of the bicycle seat post can be easily adjusted to a larger frame, eliminating the need to buy the bike seat post again.

9,99 €
08

AARON

AARON Post Seat Post with 30.9 mm Diameter, Aluminium Seat Tube with 350 mm Length, Support for City Bike, Trekking Bike, Touring Bike and Mountain Bike with Scale in Silver

33% Off

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Purchase note – Please make sure which diameter you need for your bike before purchasing. In the product images you will find all other information about measuring your saddle tube.
Easy to install – in order to easily assemble the seat post, we have included an assembly instructions (English language not guaranteed). Thanks to the printed scale, you know exactly how far you can extend the seat post to the maximum.
Durable material - Made of 6061 aluminium, the seat post is extremely shatter-proof and durable. This makes the saddle tube perfect for your city bike, city bike, women's bike and men's bicycle.
AARON products are characterised by a long service life. The high-quality AARON Post seat post becomes a faithful, long-term companion. In addition, the saddle tube is even plastic-free in a box.

19,99 € 29,99 €(33% Off off)
09

X AUTOHAUX

X AUTOHAUX 30.9 to 31.6 mm Bicycle Seat Post Tube Adapter Reducing Sleeve

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8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Size: 30.9mm to 31.6mm Inner diameter: 30.9 mm/1.21 inches, outer diameter: 31.6 mm/1.24 inches, length: 60 mm/2.36 inches
Please check the outer diameter of your bike saddle tube before ordering. Measure the inner diameter of the old clamp or the outer diameter of the seat tube. Then make the right choice.
Material: made of aluminum alloy, non-slip, rust-proof, durable in use. Colour: black
Installation Easy to install and remove, no drilling or cutting required, no tools required, just few seconds to install directly on the bike.
Application This product is suitable for most bicycles such as MTB bicycles, mountain bikes, road bikes, etc.

13,69 €
10

PLATT

PLATT Bicycle Seat Post Shim Aluminium Alloy Tube Adapter, Seat Post Reducer Sleeve Shim Bicycle Adapter for MTB (33.9 to 34.9)

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Tip: Please check or measure the outer diameter of the original seat post OR measure the inner diameter of the bicycle frame seat tube. Then make the right choice.
Size: 33.9 to 34.9, use this bicycle seat post shim. The 33.9 seat post can be converted into the 34.9 seat post.
Material: This bicycle seat post washer is made of high quality aluminium alloy, lightweight, strong, durable and corrosion resistant.
Length: 100 mm, our washers are made to 100 mm length and are longer than other washers on the market, giving your seat post much better grip in the frame.
APPLICATION: With this seat post shim, the diameter of the bicycle seat post can be easily adjusted to a larger frame, eliminating the need to buy the bike seat post again.

9,99 €